Patent GB-1121897-A (GB)
Title: Pop-out handle and lock assembly
Inventor: DAUENBAUGH ROBERT LAVERNE
IPC: E05B5/02
Filed: 1966-07-29
Abstract: 1,121,897. Releasable fastenings. NATIONAL LOCK CO. 29 July, 1966, No. 34269/ 66. Headings E2A and E2B. A pop-out handle and lock assembly comprises a casing 11 which includes an escutcheon 15 and a generally cylindrical housing 18 extending from said escutcheon and having a rear wall 19 with a central opening, a handle having a gripping portion 24 and a generally cylindrical hub mounted in the housing for longitudinal movement therein between a retracted position with the handlegripping portion received in a recess 25 in the escutcheon and a projected position where the gripping portion is free of the recess and adapted to be grasped by an operator, a cylinder lock 13 mounted in and movable with said handle, a spring actuated latch bolt 26 actuated by said cylinder lock and adapted to be received in openings 28, 22 in said hub and said generally cylindrical housing to retain said handle in its retracted position, said latch bolt having an inclined surface 47 which upon contact with the interior of the housing retracts the spring actuated latch bolt, and a radially inwardly extending flange 29 defining the rear end portion of said hub with a central opening therein, said flange having four equi-spaced longitudinal grooves 32 in the periphery of the opening, a drive spindle 33 extending through the central opening in the rear wall of the casing and the opening of the grooved flange into the chamber of the hub, an enlarged head 34 on the inner end of the drive spindle in said hub of a diameter greater than the inner peripheral diameter of said flange, a pair of diametrically opposed and axially and rearwardly extending lugs 35 on said spindle projecting from the rear of said head and adapted to be conformably received in one of the opposed pairs of grooves in the radial flange of the hub when the handle is moved to its outwardly projected position so that the handle and drive spindle rotate as a unit, said lugs being of such length that they will be disengaged from the radial flange when the handle is partly retracted to permit rotation of the handle independently of the drive spindle, inter-engaging means 42, 42a on said drive spindle co-operating with the rear wall of the casing to prevent longitudinal movement of said spindle a spiral compression spring 44 mounted in said housing about said spindle to yieldably urge the handle to its projected position and the portion of the drive spindle at the rear of the rear wall of the housing having means adapted to co-operate with a keeper. In the construction shown the keeper is screw threaded and the end portion of the drive spindle is provided with a suitable screw thread 36 but in an alternative construction, the drive spindle has a roll pin extending through it, the projecting end portions of the pin being engageable with camming surfaces of the keeper. The hub of the handle is provided with longitudinally extending elongated ribs (not shown) on its exterior surface adjacent the gripping portion and the forward end portion of the housing has internal longitudinally extending elongated grooves to receive the ribs and align the gripping portion and the recess of the escutcheon, the ribs being of such length as to permit disengagement of the lugs on the enlarged head of the drive spindle from the grooves in the flange 29, so that the handle is rotatable relative to the drive spindle prior to retraction of the gripping portion into its recess. The hub and the housing are provided with a plurality of pairs of oppositely disposed said openings for receiving the latch bolt, the pairs being longitudinally spaced so that units of different lengths consisting of the cylinder lock and the latch bolt can be used.